Google: Fetch As Google Only For Web Index
Google's John Mueller said on Twitter that the Fetch As Google feature within the Google Search Console is only meant to be used for the web index.
This came up in regards to figuring out ways to speed up indexing old image URLs with new images...

Google Coffee Maker
Jack Fermon snapped a picture while at the GooglePlex in Mountain View, California of one of the coffee stations. As you can see, it is pretty scientific. He said "Google takes coffee very seriously.